Alan: That’s a great point. I recently submitted a request to Apple to allow selective file sharing policy on my notebook. Its fine to have file sharing enabled when I’m at home, but when I’m at a coffee shop or other public access point, I hate having to manually disable file sharing.
Dino: I really like Apple’s Network Locations feature for network configuration and I would also like it if I could associate my network security settings with it also. Windows Vista actually has a good system for this by letting the user identify networks they connect to as “Public,” “Private,” or “Work.”
Alan: Earlier this year, Steve Balmer talked about Microsoft's investigation of Webkit and ultimate decision to stick with Trident. Web developers would love to have more consistent rendering engines, but from a security standpoint, does it make sense to standardize around one set of code?
Dino: While standardization helps create a more secure single standard, it means that any breach of it will be highly applicable to Internet systems. I believe that more diversity in computer systems helps strengthen the ecosystem against attack. Having many diverse targets decreases the profitability of malware and once it ceases being profitable, there will be much less of it.
Alan: If you had to make a recommendation: Mac, PC, or Linux? Or do you find them to be equally (in)secure?
Dino: For most consumers and home users, I recommend a Mac because they are currently targeted less by Web malware. They also tend to be easier to use so I get less tech support calls. If a user is slightly more technical and/or adventurous, I recommend that they give Ubuntu Linux a try. I recommend Windows Vista for businesses because it is a more secure operating system and better suited towards management in the enterprise.
Alan: Any reason for Ubuntu specifically (full disclosure: I run Fedora on my Linux workstations)?
Dino: I have found Ubuntu to be more user-friendly and I personally prefer Debian-based Linux distributions to the others. But I don’t want to start any religious wars here.
Alan: For our Windows-based PC users, what are some tips for running a "secure" PC? What about our Mac users? Linux users?
Dino: PC users should move to Vista or Windows 7 as soon as possible to make use of their security features. Mac users should do the same with Snow Leopard. Linux users are already pretty well served by the leading desktop distributions, so they shouldn't need to take many additional precautions. For all of these operating systems, the National Security Agency (NSA) Systems and Network Attack Center (SNAC) freely publishes in-depth secure configuration guides that can be followed to further harden your operating system environment.
(Ed.: the NSA’s guidelines can be found here)